off set 05 f150 fx4
#1
10-02-2010, 04:43 PM
Join Date: Mar 2010
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#2
10-02-2010, 11:04 PM
The OEM 17 and 18 inch wheels are 7.5 inches wide with 5.5 inches of backspacing. The OEM 20's are 8.5 inches wide with 6.5 inches of BS. I assume you are going with a street tire with the tire size you listed. You will want to stay close to the OEM 6.5 inch BS with an aftermarket 20 inch wheel.